Can we use CASE in join condition in SQL Server?

you will get syntax error if you try to execute this in simple tsql. However, Yes you can do it but in dynamic tsql something like this. you will get syntax error if you try to execute this in simple tsql.

Can we use and condition in case?

CASE must include the following components: WHEN , THEN , and END . ELSE is an optional component. You can make any conditional statement using any conditional operator (like WHERE ) between WHEN and THEN . This includes stringing together multiple conditional statements using AND and OR .

Can we use CASE in WHERE clause Oracle?

You can use a CASE expression in any statement or clause that accepts a valid expression. For example, you can use the CASE expression in statements such as SELECT , UPDATE , or DELETE , and in clauses like SELECT , WHERE , HAVING , and ORDDER BY .

How do I do an if statement in SQL?

We can understand SQL IF Statement using the following flow chart.

The condition in SQL IF Statement should return a Boolean value to evaluate.
We can specify a Select statement as well in a Boolean expression, but it should enclose in parentheses.
We can use BEGIN and END in the IF Statement to identify a statement block.

Is null in case SQL?

SQL offers two case abbreviations to cope with null : coalesce and nullif . Both are used like functions and do not use the keywords case , when , then , else and end .

Can we write conditions in switch case?

In some cases, using the switch case statement is seen to be more convenient over if-else statements. Consider a situation, when you want check the mark and display the message accordingly.

Can we write case in where clause?

CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING.

Is Empty in SQL?

Use the IS [NOT] EMPTY conditions to test whether a specified nested table is empty, regardless whether any elements of the collection are NULL . The condition returns a boolean value: TRUE for an IS EMPTY condition if the collection is empty, and TRUE for an IS NOT EMPTY condition if the collection is not empty.

How to use case in SQL?

SQL CASE The SQL CASE statement. The CASE statement is SQL’s way of handling if/then logic. Adding multiple conditions to a CASE statement. A quick review of CASE basics: CASE must include the following components: WHEN, THEN, and END. Using CASE with aggregate functions. Using CASE inside of aggregate functions. …

What is a case function in SQL?

Case Function. Case function execute a sequence of statement depending upon condition. CASE function in SQL operates by comparing the first expression to the expression in each WHEN clause for equivalency. Expressions which are equivalent in Case function, expression in the THEN clause will be executed.

How does case statement work in SQL?

The Case statement in SQL is mostly used in a case with equality expressions. The SQL Case statement is usually inside of a Select list to alter the output. What it does is evaluates a list of conditions and returns one of the multiple possible result expressions.